Computational study of Solidity and Tip clearance on the performance of a Single Stage low Pressure turbine. | [Proceedings 6th International Bhurban Conference on Applied Sciences and Technology • 2009]

Author(s):

1. Muhammad Faisal: National Engineering & Scientific Commission (NESCOM), Islamabad, Pakistan

2. Jahanzab Masud: Institute of Avionics and Aeronautics (IAA), Air University, Islamabad, Pakistan

3. Khalid Pervaiz: College of Aeronautical Engineering (CAE), PAF Academy, Risalpur, Pakistan

Abstract:

In the present study the effect of solidity and tip clearance has been studied for the single stage low pressure turbine. Fluent finite volume based CFD code is used for this computational study. Mixing planes are used to link the rotating and non rotating components. Periodic conditions are applied in order to reduce the computational cost. The effect of turbulence model and grid size on computed results has also been evaluated and it was ensured that the results are independent of grid and turbulence model. In the present work various values of solidity have been used by changing the chord to pitch ratio i.e., by changing the number of blades of rotor and results shown that separation occur in low solidity rotor, while in high solidity rotor boundary layer dominates the flow. Various tip clearances ranging from zero to six percent of blade height have been used to analyze the effect of tip clearance height on computed efficiency and the results shown that efficiency decreases with an increase in tip clearance. For the present paper, computations are focused on design point speed and flow rate.

Page(s): 242-253

DOI: DOI not available

Published: Journal: Proceedings 6th International Bhurban Conference on Applied Sciences and Technology , Volume: 1, Issue: 0, Year: 2009

Keywords:

Keywords are not available for this article.

References:

References are not available for this document.

Citations

Citations are not available for this document.

Citations

Downloads

Views